The tournament, which began on October 11 and wrapped up on October 20, saw nine sides divided into two pools, with the pools participating in a round robin.
The winners of each pool played off in Sunday's grand final.
In the grand final, Rochester could only score 48, all out in the 17th over of play.
An unbeaten 20 from Liam Hamilton was more than enough to guide his side to victory , with BLU passing the target in the 12th over, winning by five wickets to claim the championship.
GMC junior coordinator Justin Cleary said the new concept was based on increasing participation at an early stage of the season.
"It's something we thought would be able to get players into clubs and hopefully keep them,” he said.
"It's not a huge commitment across the the few weeks of competition, and it's a really strong way to expose people to cricket.
"We find that people get to do more in a game of T20 than they do in 40 overs - you are always looking for something to happen every ball, players are trying to make runs quickly so they bat quicker and get out more often.
"Players were happy to get involved in the game this way, they've really enjoyed the tournament and for our club (Rochester) a few players have wanted to stick around and be a part of the regular season. Hopefully we will continue to see participation numbers rise off the back of this."
While the competition is still in its infancy, Cleary said he hopes to see it grow.
"I'd love to see this become an annual tournament,” he said.
"Playing the games on Friday's and Sunday's, it opens it up to a lot more people, and it also opens players up to the chance to play regular cricket on a Saturday as well.
"We're in a position this year where we played with nine teams, but there is the potential to expand that not only within our clubs, but a bit further than that in the region. It's open to a few opportunities that can help to expand the game."
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